Showing resource monitor UI decreases network performance by half

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http://superuser.com – Whenever I show the Network tab of the Windows Resource Monitor in Windows 8 my wireless network performance decreases by 50%. I was trying to work out why I was not getting anything more than 150Mbps on an 802.11n network and thought I would use the Resource Monitor to get feedback but whenever I show the Ui network performance dips from 21MB/s to 9MB/s as in the graph below. The red bars highlight the dips that occur when restoring the window: If I open Resource Monitor and minimize it the effect is nil but the moment I show/restore the dialog my network performance dips to < 50%. I (HowTos)